<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../bootstrap/css/bootstrap.css">
</head>
<body>

<div class="btn-group">
    <a href="#" class="btn btn-primary active" aria-current="page">Active link</a>
    <a href="#" class="btn btn-primary">Link</a>
    <a href="#" class="btn btn-primary">Link</a>
</div>

<script src="../bootstrap/js/bootstrap.js"></script>
</body>
</html>